A combination configuration consists of a material placed into and over a cut crack. A squeegee is used to shape the material into a band that is centered over the crack reservoir.
Individual configurations are based on four controlling variables, which can be sealed by Crack Sealing Machine.
Type of application.
Direct---Material applied directly to crack channel.
Bond-Breaker-Backer material placed at bottom of crack reservoir prior to material installation in order to prevent three-sided adhesion.
Type of crack channel
Uncut
Cut---router or saw used to create uniform crack reservoir
Strike-off or finishing characteristics
Recessed
Flush
Capped
Band-aid
Dimensions of crack reservoir and overband
Nearly all Crack Sealing and filling operations have the material applied directly to the crack channel. Occasionally, however, a bond-breaker material, such as polyethylene foam backer rod, is placed at the reservoir bottom of a working crack prior to sealant application. The backer rod prevents sealant material from running down into the crack during Crack Sealing Machine application and also from forming a three-sided bond with the reservoir perimeter. As a result, the sealant’s potential performance is enhanced.
